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Sulfidizing process for gate lines of solar cell pieces

A technology for solar cell and vulcanization treatment, which is applied in the field of solar cell processing technology, can solve problems such as poor appearance and silver vulcanization of cell grid lines, and achieves the effects of low implementation cost, simple process and easy realization.

Active Publication Date: 2014-09-10
JA SOLAR
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Problems solved by technology

[0007] The purpose of the present invention is to provide a solar cell grid line vulcanization treatment process with simple process and low implementation cost, which can effectively solve the problem of silver vulcanization of the cell grid line, avoid poor appearance, and do not affect the conversion efficiency of the cell

Method used

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  • Sulfidizing process for gate lines of solar cell pieces
  • Sulfidizing process for gate lines of solar cell pieces
  • Sulfidizing process for gate lines of solar cell pieces

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Embodiment Construction

[0026] The invention discloses a solar cell sheet grid line vulcanization process, which is to heat the solar cell sheet with vulcanized grid line at 350±10°C for at least 80 seconds and then cool it. After heating the solar cells with sulfided grid lines, the silver sulfide can be completely decomposed, so as to achieve the purpose of removing sulfide and avoiding poor appearance, and will not affect the conversion efficiency of the cells.

[0027] In this embodiment, the sintering furnace on the solar cell production line is used to heat the solar cells whose grid lines are vulcanized. The sintering furnace is produced by Despatch, and the conveyor belt of the sintering furnace runs at a speed of 250 in / min.

[0028] The heating temperature is obtained through the following specific steps:

[0029] ⑴Take the sorted out solar cells with vulcanized grid lines;

[0030] ⑵Heat one of the solar cells at 250°C for at least 80 seconds;

[0031] ① If the silver sulfide on the grid...

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Abstract

The invention discloses a sulfidizing process for the gate lines of solar cell pieces. According to the sulfidizing process, heating treatment is carried out on the solar cell pieces with the sulfidized gate lines at a heating temperature of 350+ / -10 DEG C for at least 80 seconds, and then cooling to obtain products. The solar cell pieces with the sulfidized gate lines are heated by virtue of a sintering furnace on a solar cell piece production line, the running speed of the conveying belt of the sintering furnace is 250+ / -10in / min, the temperature of the drying area of the sintering furnace is 350+ / -10 DEG C, the temperature of the sintering area is 450+ / -10 DEG C, and the solar cell pieces are arranged on the conveying belt and sequentially pass through the drying area and the sintering area. According to the sulfidizing process disclosed by the invention, after the heating treatment is carried out on the solar cell pieces with the sulfidized gate lines, silver sulphide can be completely decomposed, thus achieving the purposes of achieving sulfidizing removal and avoiding poor appearance, and avoiding influence on the conversion efficiency of the cell pieces. The sulfidizing process disclosed by the invention is simple, low in implementation cost, and beneficial to wide popularization and application.

Description

technical field [0001] The invention relates to a process for treating a solar cell, in particular to a process for vulcanizing a grid line of a solar cell. Background technique [0002] Crystalline silicon solar cells generally use silver paste to print electrodes and fine grid lines on the surface of the cell to collect and conduct current. In the sorting process, it is often found that the grid lines of solar cells are yellowed and blackened, resulting in poor appearance and causing large economic losses to the enterprise. After analysis and research, it is concluded that the yellowing and blackening of the grid lines are caused by silver sulfide. [0003] Specifically, silver is an unstable metal that will turn yellow and black due to external factors. When hydrogen sulfide is contained in the air, the surface of silver will lose its silvery white luster. This is because silver and H in the air 2 S synthesis into black Ag 2 S sake. [0004] Its chemical reaction equa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18
CPCH01L31/022425H01L31/1876Y02E10/50Y02P70/50
Inventor 靳松波李强强陈同飞曹卫亮董玉良
Owner JA SOLAR
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